Replacement Chrome Swivel Office Chair Gas Lift Cylinder Pneumatic - Standard Height - S6133 2" (50mm) wide x 9.25" (235mm) tall chrome main support column that will fit most chair bases 5" piston stroke adjustment range (up & down) 16.33" (415mm) total overall length when extended Ideal to replace gas cylinders on most standard office chairs, task chairs, executive chairs, and more. Chrome